travis is not detecting the libraries required to build the sketch

examples/ESP32_AsyncFSBrowser/ESP32_AsyncFSBrowser.ino

@@ -1,4 +1,7 @@
 #ifdef ESP8266
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#include <ESPAsyncWebServer.h>
 void begin(){}
 void loop(){}
 #else

examples/ESP_AsyncFSBrowser/ESP_AsyncFSBrowser.ino

@@ -1,4 +1,7 @@
 #ifdef ESP31B
+#include <ESP31BWiFi.h>
+#include <ESPAsyncTCP.h>
+#include <ESPAsyncWebServer.h>
 void begin(){}
 void loop(){}
 #else

travis/common.sh

@@ -6,11 +6,6 @@ function build_sketches()
     local srcpath=$2
     local sketches=$(find $srcpath -name *.ino)
     for sketch in $sketches; do
-        local sketchdir=$(dirname $sketch)
-        if [[ -f "$sketchdir/.test.skip" ]]; then
-            echo -e "\n\n ------------ Skipping $sketch ------------ \n\n";
-            continue
-        fi
         echo -e "\n\n ------------ Building $sketch ------------ \n\n";
         $arduino --verify $sketch;
         local result=$?